The peak of Mt. Everest is the highest point on earth, at 29,034 feet above
sea level. Mt. Everest is also rising at an approximate rate of one centimeter
per year due to the movement of the continental plates that formed the Himalayas
in the first place. Based on this reckoning, Mt. Everest would have been approximately
150 feet lower 4,500 years ago, when the Great Pyramid is believed to have been
constructed. At 28,884 feet above sea level, Mt. Everest would have been an
even 1,440 times shorter than the diameter of the earth. Mt. Everest was also
exactly 60 times taller than the Great Pyramid, 4,500 years ago:

481.4 feet x 60 = 28,884 feet.

This is an interesting synchronicity, given the ancient base 60 systems of
arithmetic that have left us with the twin legacies of a base 60 system of time: